Air-brake.



No. 788,801.. PATENTED FEB. 28, 1906. J, RILEY.

AIR BRAKE.

APPL IOATION FILED APR. 27, 1904 Mo. 'Z83,801.

STATES Patented February 28, 1905.

JOHN RILEY, OF GREENSBURG, PENNSYLVANIA.

AIR-BRAKE.

SPECIFICATION forming part of Letters Patent No. 783,801, ed February 28, 1905.

l t Application filed April 27, 190 Serial No. 205,224.

To all whom it may concern:

Be it known that 1, JOHN RILEY, a citizen of the United States of America, residing at Greensburg, in the county of l Vestmoreland and State of Pennsylvania, have invented certain new and useful Improvements in Air- Brakes, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention has relation to certain new and useful improvements in apparatus for recharging an auxiliary cylinder of an air-brake system; and the object of the invention is to provide mechanism, in combination. with a triple valve and a retaining-valve, whereby when the pressure in the auxiliary cylinder is reduced the retaining-valve will be closed and the triple valve permitted to recharge the auxiliary reservoir.

Another object of my invention is to provide automatic means, in combination with the triple valve, whereby the retaining-valve will be opened and closed as the pressure in the auxiliary reservoir varies; and a further object of my invention is to locate my improved mechanism adjacent to the triple valve whereby the pipe that is used between the triple valveand the retaining-valve is entirely dispensed with and the mechanism so constructed as to occupy a comparatively small space, all parts being arranged as to automatically operate when the pressure in the auxiliary reservoir varies.

The invention further consists in the novel construction, combination, and arrangement of parts to be hereinafter fully described and claimed.

in the drawings, Figure 1 is a vertical sectional view of a retaining-valve and its appurtenant parts as constructed upon a triple valve, and Fig. 2 is a transverse sectional view taken on the line :1; of Fig. 1.

As heretofore stated, the object of my invention is to provide mechanism, in connection with the triple and the retaining valve of the air-brake system, whereby when the auxiliary reservoir has been charged to its prescribed capacity the air from the triple valve will be permitted to exhaust and when pressure in the auxiliary reservoir is reduced the exhaust to the retaining-valve will be closed and the auxiliary reservoir again charged, and in carrying my invention into effect I employ the ordinary triple valve new used and designated in the accompanying drawings by the reference-numeral 1, and in connection with this triple valve 1 also employ parts of the retaining-valve that is now commonly used in air-brake systems and more particularly upon the services employed in connection with freight-cars.

The refer'encc-numerals 2 and 3 indicate two parts of a casting, these parts having one of their ends flanged, as indicated at L, and these flanged ends are secured together by bolts 5 and nuts 6, a rubber gasket? being interposed between these flanged ends and any number of bolts and nuts being employed to secure these ends together, whereby an air-tight connection is established. These castings 2 and 3 when secured together form a hollow body portion that is secured upon the top of the triple valve by any suitable means or may be bolted to the flanged ends of the triple valve. The casting 2 has formed integral with its end an annular collar 8, the upper edge of which is recessed, as indicated at 5), said recess having threads formed upon its side, and adapted to engage said threads are the threads 10, carried upon the lower end of the retaining-valve casing, and in this casing is located the retaining-valve weight 11, which carries a downwardly-extending pin 12, this pin being arranged centrally of the weight, these last three parts mentioned being of the ordinary construction of retaining-valve now used.

Formed integral with the casting 2 and in vertical alinement with the pin 12 I. provide a screw-tlweaded boss 14, having an aperture 15 formed therein, this boss being formed on the under face of the casting and said aperture 15 communicating with the interior of said casting, and adjacent this aperture l also form an exhaust-port 16, which communicates with the atmosphere and the interior of the casting.

The reference-inimeral 1'7 indicates a con nection the one end of which is secured upon the boss 14, while the other end thereof is connected to an exhaust-port 18 of the triple valve, thisportordinarilyleadingto thebrakel air from the triple valve to exhaust through cylinder.

The casting 3 has formed integral with its outer end an annular shell or cylinder 19, the upper end of which is exteriorly screw-threaded, as indicated at 20, to receive a cap 21, carrying an exteriorly-screw-threaded boss 22, this boss having an aperture 23 formed therein, which communicates with the interior of the annular shell or cylinder 19 and with the auxiliary reservoir, (not shown,) and in this shell or cylinder is mounted a piston 24, which carries on its upper end a head 25, which fits snugly within the shell or cylinder and is adapted to move vertically therein, and the other end of the piston 2 1is pivotally connected. as indicated at 26, to one end of a lever 27, this lever carrying intermediate of its length and upon each side thereof pins 28 28, which are adapted to rest upon hooks 29 29, that are formed integral with the casting 3 and extend downwardly from the upper edge thereof, these hooks and pins forming a pivotal point for the lever 27. The outer end of this lever, as designated by reference-numeral 30, is provided with an aperture 31, through which the pin 12 of the retainingvalve weight passes and is secured therein.

Upon the interior of the shell or cylinder 19 I provide an annular flange 32, and upon this annular flange and surrounding the piston 24 I provide a spiral spring 33, the upper end of which is adapted to engage the lower face of the head 25 and normally hold this head 25 in the position shown in Fig. 1 of the drawings, especially when the pressure in the auxiliary reservoir is at its normal pressure, it being understood that the pipe from the auxiliary reservoir is connected upon the boss 22 of the cap 21.

The operation of my improved apparatus is as follows: e will assume that the normal pressure in the auxiliary reservoir is seventy pounds and the spring 33, carried in the shell or cylinder, is of sufficient strength to resist this pressure and hold the head 25, carried by the piston 2 k, in the position shown in Fig. 1 of the drawings, and upon the pressure being reduced in the auxiliary reservoir the spring 33 will raise the head 25, raising the end of the lever 27 by means of the piston 32, and this lever being pivotally mounted centrally of its length will lower the opposite end 30 of the lever, this movement being further facilitated by the retaining-valve weight 11. Upon the weight being lowered the pin 12 will engage in the aperture 15, closing off the exhaust of air and permitting the triple valve to recharge the auxiliary reservoir, and upon the pressure in the reservoir exceeding seventy pounds (the assumed normal pressure) the head 25 will be forced downwardly, overcoming the tension of the spring 33 and raisingthe end 30 of the lever and permitting the the port 16 of the casting 2.

By referring to Fig. 1 of the drawings it will be noted that I have mounted the retaining-valve in close proximity to the triple valve, any desired means being employed for securing this triple valve in position shown in Fig. 1, and heretofore this retaining-valve and its appurtenant parts in the freight-car equipment have been mounted adjacent to the brakewheel upon one end of the freight-car, and in my construction the pipe necessary to communicate with this pressure-retaining valve is entirely dispensed with, and the valve is mounted beneath the car upon or in close proximity to the triple valve of the ordinary construction now employed.

In Fig. 1 of the drawings I have illustrated means whereby the retaining-valve and its connections may be entirely out off from the airbrake service, and the reference-numeral 35 indicates a stop-cock of the ordinary construction, which is used to accomplish this purpose.

To prevent the air from exhausting too rapidly from the retaining-valve, I provide a small port 34 in the end of the lever 27, this port being adapted to register with the port 16 when that end of the lever is in a lowered position. This construction permits all air that has accumulated within the casings to escape.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In an apparatus of the character described, the combination with a triple valve, of a retaining-valve mounted adjacentto said triple valve, a casting connected to said retaining-valve, a lever pivotally mounted with in said casting, a piston-head mounted in said casting and connected to said lever, means whereby when the piston-head is raised the exhaust-ports of the retaining-valve will be closed, and means whereby when said pistonhead is lowered, the exhaust-port of the retaining-valve will be opened.

2. In an apparatus of the character described, the combination with a triple valve, of a retaining-valve mounted adjacent to said triple valve, a casting carried by said retaining-valve, a piston-head operating in said casting, and a lever pivoted in the casting and connecting the piston and retaining-valve and means whereby when the piston-head is raised the exhaust-ports of the retaining-valve will be closed and when the piston-head is lowered the exhaust-ports of the retaining-valve will be opened, substantially as described.

3. In an apparatus of the character described, the combination with a triple valve, of a two-part casing, one end of said casing having an inlet and an exhaust port formed therein, a piston-head mounted in the other end of said casing, a pressure-line connected to said end of the casing, a lever located in said casing and adapted to be connected to said piston-head, means whereby when said pressure is reduced the inlet and exhaust ports of the casing will be closed, and means whereby when the pressure is increased, said inlet and exhaust ports of the easing will be opened.

4. in an apparatus of the character described, the combination with a triple valve, of a two-part valve-casing located adjacent to said triple valve, said casing having an inlet and an exhaust port formed therein, a pistonhead mounted in one end of said casing, a lever pivotally mounted in said casing and adapted JOHN RILEY.

\ vitnessesz E. E. Po'r'rna, K. H. BUTLER. 

